I picked up a used Toshiba Satellite Pro L830 but the operating system is mashed, also there's no DVD. So, I thought I'd buy a new OS, preferably Win 7 Home premium or Wind 8.1 (both 32bit) The problem I'm having is difficulty buying a retail copy of either. The only ones that seem to be available (on non-suspicious sites) are OEM versions or 64bit. It's 3 or 4 years since I worked in IT & it was far easier then to buy a retail copy of Windows. Could I get away with buying an OEM copy or is it actually possible to buy retail?